Light control welding mask can always protect the welder's eyes from UV and infrared damage. This protection exists whether the lens is dark or not. However, the faster the mask lens becomes darker, the less likely it is that the welder's eyes will feel discomfort due to high-intensity visible light. A few tenths of a second is not perceived by the eyes, the company's light control welding mask.We are Welding Torch,Welding Consumable supplierl.Our welding mask will make your eyes feel most comfortable.